The moisture meter can quickly measure the moisture content of the grain. 1. Release high concentrations of active ozone every minute and actively break down harmful substances such as formaldehyde and nitrites. 2. It only breaks down harmful substances in the water, without harming the fish , you do not need to use it every day, simply and without problems. 3. It does not take up space in the aquarium, you can use it immediately after connecting to the air pump. 4. With the function of deodorization and purification of aquarium water, pure algae, necessary for the aquarium. 5. Energy saving and low power consumption, with an adjustable knob to adjust the operating status . . OZONE GENERATOR WATER PURIFIER FOR AQUARIUM Specification: Item Type: Aquarium Ozone Generator Material: plastic Color : as picture shown Weight: approx. 480.0 g/16.9 oz Purpose: Purification of aquarium water and removal of algae Power: 6W Amount of ozone : 120 mg . OZONE GENERATOR WATER PURIFIER FOR AQUARIUM Instructions for adjusting the knob: 1. First press the adjustment knob down, then turn the adjustment knob 2. The indicator light in the work display area lights up and is adapted to the required operating status 3. Stop turning the adjustment knob, the indicator light will flash until the indicator light turns on and automatically goes into working condition List of packages: 1 x Aquarium Ozone Generator 1 x Hose 1 x Air Check Valve . OZONE GENERATOR WATER PURIFIER FOR AQUARIUM